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Blue intensity in Pinus sylvestris tree-rings: developing a new palaeoclimate proxy
Stockholm University, Faculty of Science, Department of Physical Geography and Quaternary Geology.
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2007 (English)In: The Holocene, Vol. 17, no 6, 821-828 p.Article in journal (Refereed) Published
Abstract [en]

Minimum blue intensity measurements of resin-extracted Pinus sylvestris (L.) samples, conducted using a flat-bed scanner and commercially available software, are shown to provide a robust and reliable surrogate for maximum latewood density. Blue intensity data from 15 trees, from three stands, are reported relative to a standard blue-scale in a manner similar to grey-scale calibration in x-ray densitometry. The resulting time series are highly correlated with x-ray densitometry data generated from the same samples and preserve the same high level of signal strength. Sensitivity to summer climate variables is similar to that identified in the relative density record, demonstrating that minimum blue intensity can also be used for the study of climate change. While not a replacement for the powerful range of x-ray densitometry techniques, blue intensity provides an inexpensive and accessible alternative for accessing palaeoclimatic information.

Place, publisher, year, edition, pages
2007. Vol. 17, no 6, 821-828 p.
Keyword [en]
Reflected light image analysis, blue intensity, dendrochronology, dendroclimatology, Scots pine, relative density, tree line, palaeoclimate
URN: urn:nbn:se:su:diva-19430DOI: doi:10.1177/0959683607080523ISI: 000250623100011OAI: diva2:185954
Available from: 2009-01-30 Created: 2009-01-30 Last updated: 2011-01-11Bibliographically approved

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Grudd, H
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Department of Physical Geography and Quaternary Geology

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